Hi
Quantizing after a pattern is already created with no record quantization switched on, the trigs quantize parameter in the track menu is indeed what works and does that job as you and TSV suggest.
If you also manually set micro timing shifts on your tracks trigs the tracks quantize parameter again in the trigs setup menu will also quantize and unquantize as TSV mentions.
In Global Menu/Sequencer Configuration, there is an option to quantize live recording which is what I think you mention you are already using, BTW for anyone else reading who hasn’t spotted it yet there is a nice little shortcut to switch it on/off on the fly: Hold record and double tap play, same to undo.
Between the global and individual track quantize parameter and each different tracks ability to run at different note lengths/meters in tandem with the global time division some seriously ultra grooving/other interesting effects with the ability to move in, between and out of the groove/beat in real time is fantastic.
regards